public ActionResult Save(DtoTransaction dto)
        {
            if (NewItem(dto))
            {
                dto.Id = Guid.NewGuid();
                using (var repository = new RepositoryTransaction())
                {
                    repository.Create(dto);
                }
            }
            else
            {
                using (var repository = new RepositoryTransaction())
                {
                    repository.Update(dto);
                }
            }

            return(RedirectToAction("Index"));;
        }